Skyguy11, I guess I don't understand your question.
But I will try to answer what I think you're asking. Let's take a hypothetical approach, where the field elevation and TDZ are both at sea level 0'. The approach is an ILS/DME
and the G/S intercept alt is at 5DME and 1500' and there is the maltese cross there indicating a FAF (I say loc only).
Suppose you are vectored in your altitude is 3000' and you are turned final at 15 miles, your approach clearance is "turn R/L Heading XXX intercept the localizer, cleared for the approach". Once you are established on the Loc and have intercepted the G/S you are on the approach. If what you were saying was true then you would have to leave 3000 on the localizer and then descend to 1500 as you would if the g/s was out because you are not on the final approach segment of the approach.
I can tell you in 35+ years of flying I have never had, in the US or anyplace else in the world a controller ask me to report the FAF on an ILS. If they ask anything they will ask to report the marker inbound.
However, for a localizer only, I have been asked on almost every approach to call the FAF.
Again, I'm not quite sure what it is your asking
UPDATE: Again, I disagree. I understand what you're saying about the glideslope intercept altitude, but again the OM would come into play on the approach. For example, if the field goes below minimums you can continue once you're inside the OM, not the FAF, because there isn't one.
[Edited 2004-04-11 09:04:47]